libc/uClibc: add patch to fix fork in threads with ARM EABI

uClibc-0.9.32 requires libgcc_eh.a (for ARM EABI), but only when libubacktrace
is enabled. As this is not the default, provide a workaround to disable linking
with libgcc_eh.a if libubacktrace is not selected.

This will however still break if uClibc is configured to enable libubacktrace,
but it requires a fix in gcc, and we can take care of that later.

Reported-by: Grant Edwards <grant.b.edwards@gmail.com>
Reported-by: Tor Krill <tor@codeknot.com>
Tested-by: Tor Krill <tor@codeknot.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

Enable building a pure soft-float compiler without the need for a software

floating point library.

diff -dur gcc-4.0.4.orig/gcc/config.gcc gcc-4.0.4/gcc/config.gcc

--- gcc-4.0.4.orig/gcc/config.gcc	2007-02-02 19:12:28.000000000 +0100

+++ gcc-4.0.4/gcc/config.gcc	2007-02-02 19:12:07.000000000 +0100

@@ -677,7 +677,7 @@

 		tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines"

 		;;

 	esac

-	tmake_file="${tmake_file} arm/t-arm arm/t-linux"

+	tmake_file="${tmake_file} arm/t-arm arm/t-linux arm/t-arm-elf"

 	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"

 	gnu_ld=yes

 	;;