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

base-linux/src/core/target.mk

@@ -1,6 +1,6 @@
 TARGET        = core
 REQUIRES      = linux
-LIBS          = cxx ipc heap core_printf child lock raw_server syscall raw_signal
+LIBS          = cxx base-common syscall startup
 
 GEN_CORE_DIR  = $(BASE_DIR)/src/core
 
@@ -18,17 +18,17 @@ SRC_CC        = main.cc \
                 io_mem_session_component.cc \
                 signal_session_component.cc \
                 signal_source_component.cc \
-                thread.cc \
                 thread_linux.cc \
                 context_area.cc \
-                debug.cc \
-                rm_session_mmap.cc
+                core_printf.cc \
+                thread.cc
 
 INC_DIR      += $(REP_DIR)/src/core/include \
                 $(GEN_CORE_DIR)/include \
                 $(REP_DIR)/src/platform \
                 $(REP_DIR)/src/base/ipc \
-                $(REP_DIR)/src/base/env
+                $(REP_DIR)/src/base/env \
+                $(REP_DIR)/src/base/console
 
 HOST_INC_DIR += /usr/include
 
@@ -43,12 +43,11 @@ LD_SCRIPT_STATIC = $(LD_SCRIPT_DEFAULT) \
 endif
 
 vpath main.cc                     $(GEN_CORE_DIR)
-vpath thread.cc                   $(BASE_DIR)/src/base/thread
 vpath ram_session_component.cc    $(GEN_CORE_DIR)
 vpath cpu_session_component.cc    $(GEN_CORE_DIR)
 vpath platform_services.cc        $(GEN_CORE_DIR)
 vpath signal_session_component.cc $(GEN_CORE_DIR)
 vpath signal_source_component.cc  $(GEN_CORE_DIR)
-vpath debug.cc                    $(REP_DIR)/src/base/env
-vpath rm_session_mmap.cc          $(REP_DIR)/src/base/env
+vpath core_printf.cc              $(BASE_DIR)/src/base/console
+vpath thread.cc                   $(BASE_DIR)/src/base/thread
 vpath %.cc                        $(PRG_DIR)

base-linux/src/test/lx_hybrid_ctors/target.mk

@@ -1,6 +1,6 @@
 TARGET = test-lx_hybrid_ctors
 SRC_CC = main.cc
-LIBS   = env lx_hybrid
+LIBS   = lx_hybrid
 
 TESTLIB_SO     = libtestlib.so
 TESTLIB_SRC_CC = testlib.cc

base-linux/src/test/lx_hybrid_errno/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-lx_hybrid_errno
 SRC_CC = main.c
-LIBS   = env cxx thread lx_hybrid
+LIBS   = lx_hybrid

base-linux/src/test/lx_hybrid_exception/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-lx_hybrid_exception
 SRC_CC = main.cc
-LIBS   = env lx_hybrid
+LIBS   = lx_hybrid

base-linux/src/test/lx_hybrid_pthread_ipc/target.mk

@@ -1,3 +1,3 @@
 TARGET = test-lx_hybrid_pthread_ipc
 SRC_CC = main.c
-LIBS   = env cxx thread lx_hybrid
+LIBS   = lx_hybrid

base-linux/src/test/rm_session_mmap/target.mk

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