libc/newlib: don't do // downloads

The newlib FTP site does not like // downloads, and quickly
blocks the IP from the downloader.

Override the number of chunks when downloading newlib.

scripts/build/libc/newlib.sh

@@ -14,9 +14,16 @@ libc_newlib_version() {
 }
 
 do_libc_get() {
+    local libc_src
+    local avr32headers_src
+    local save_chunks
+
     libc_src="ftp://sources.redhat.com/pub/newlib"
     avr32headers_src="http://dev.doredevelopment.dk/avr32-toolchain/sources"
 
+    save_chunks="${CT_DOWNLOAD_MAX_CHUNKS}"
+    CT_DOWNLOAD_MAX_CHUNKS=1
+
     if [ -z "${CT_LIBC_NEWLIB_CVS}" ]; then
         CT_GetFile "newlib-${CT_LIBC_VERSION}" ${libc_src}
     else
@@ -30,6 +37,8 @@ do_libc_get() {
     if [ "${CT_ATMEL_AVR32_HEADERS}" = "y" ]; then
         CT_GetFile "avr32headers" ${avr32headers_src}
     fi
+
+    CT_DOWNLOAD_MAX_CHUNKS="${save_chunks}"
 }
 
 do_libc_extract() {