Merge base libraries into a single library

This patch simplifies the way of how Genode's base libraries are
organized. Originally, the base API was implemented in the form of many
small libraries such as 'thread', 'env', 'server', etc. Most of them
used to consist of only a small number of files. Because those libraries
are incorporated in any build, the checking of their inter-dependencies
made the build process more verbose than desired. Also, the number of
libraries and their roles (core only, non-core only, shared by both core
and non-core) were not easy to capture.

Hereby, the base libraries have been reduced to the following few
libraries:

- startup.mk contains the startup code for normal Genode processes.
  On some platform, core is able to use the library as well.
- base-common.mk contains the parts of the base library that are
  identical by core and non-core processes.
- base.mk contains the complete base API implementation for non-core
  processes

Consequently, the 'LIBS' declaration in 'target.mk' files becomes
simpler as well. In the most simple case, only the 'base' library must
be mentioned.

Fixes #18

os/src/server/fs_rom/target.mk

@@ -1,3 +1,3 @@
 TARGET = fs_rom
 SRC_CC = main.cc
-LIBS   = cxx env server signal
+LIBS   = base

os/src/server/iso9660/target.mk

@@ -1,3 +1,3 @@
 TARGET = iso9660
-LIBS   = env cxx signal server
 SRC_CC = main.cc iso9660.cc
+LIBS   = base

os/src/server/loader/target.mk

@@ -1,4 +1,4 @@
 TARGET   = loader
-LIBS     = cxx env thread server child signal init_pd_args
+LIBS     = base init_pd_args
 SRC_CC   = main.cc
 INC_DIR += $(PRG_DIR)

os/src/server/mixer/target.mk

@@ -1,3 +1,3 @@
 TARGET = mixer
-LIBS   = env cxx server signal
 SRC_CC = mixer.cc
+LIBS   = base

os/src/server/nic_bridge/target.mk

@@ -1,6 +1,6 @@
 TARGET    = nic_bridge
-LIBS      = env cxx server net signal
+LIBS      = base net
 SRC_CC    = address_node.cc component.cc mac.cc \
             main.cc packet_handler.cc vlan.cc
 
-vpath *.cc $(REP_DIR)/src/server/proxy_arp
+vpath *.cc $(REP_DIR)/src/server/proxy_arp

os/src/server/nic_loopback/target.mk

@@ -1,3 +1,3 @@
 TARGET = nic_loopback
-LIBS   = env cxx server signal
 SRC_CC = main.cc
+LIBS   = base

os/src/server/nit_fb/target.mk

@@ -1,3 +1,3 @@
 TARGET = nit_fb
 SRC_CC = main.cc
-LIBS   = cxx env server signal
+LIBS   = base

os/src/server/nitpicker/genode/target.mk

@@ -1,5 +1,5 @@
 TARGET   = nitpicker
-LIBS     = cxx env server blit signal
+LIBS     = base blit
 SRC_CC   = main.cc \
            view_stack.cc \
            view.cc \

os/src/server/part_blk/target.mk

@@ -1,3 +1,3 @@
 TARGET = part_blk
-LIBS   = env cxx signal server
+LIBS   = base
 SRC_CC = main.cc back_end.cc

os/src/server/ram_fs/target.mk

@@ -1,4 +1,4 @@
 TARGET   = ram_fs
 SRC_CC   = main.cc
-LIBS     = cxx env server signal
+LIBS     = base
 INC_DIR += $(PRG_DIR)

os/src/server/rom_loopdev/target.mk

@@ -1,3 +1,3 @@
 TARGET = rom_loopdev
-LIBS   = env cxx server signal
 SRC_CC = main.cc
+LIBS   = base

os/src/server/rom_prefetcher/target.mk

@@ -1,3 +1,3 @@
 TARGET = rom_prefetcher
 SRC_CC = main.cc
-LIBS  += env cxx server
+LIBS  += base

os/src/server/tar_fs/target.mk

@@ -1,4 +1,4 @@
 TARGET   = tar_fs
 SRC_CC   = main.cc
-LIBS     = cxx env server signal
+LIBS     = base
 INC_DIR += $(PRG_DIR)

os/src/server/tar_rom/target.mk

@@ -1,3 +1,3 @@
 TARGET = tar_rom
 SRC_CC = main.cc
-LIBS   = cxx env server
+LIBS   = base

os/src/server/terminal_crosslink/target.mk

@@ -1,4 +1,3 @@
 TARGET   = terminal_crosslink
-SRC_CC   = main.cc \
-           terminal_session_component.cc
-LIBS     = cxx env server signal
+SRC_CC   = main.cc terminal_session_component.cc
+LIBS     = base

os/src/server/terminal_log/target.mk

@@ -1,3 +1,3 @@
 TARGET = terminal_log
 SRC_CC = main.cc
-LIBS   = cxx env server signal
+LIBS   = base

os/src/server/vmm/target.mk

@@ -1,5 +1,5 @@
 TARGET    = vmm
 REQUIRES  = trustzone platform_vea9x4
-LIBS      = env cxx elf signal
+LIBS      = base
 SRC_CC    = main.cc
-INC_DIR  += $(PRG_DIR)/include
+INC_DIR  += $(PRG_DIR)/include