toolchain/gcc: .init and .fini need to pick one ISA

The .init and .fini sections are built by concatenating code
fragments. Putting mips16 code in the middle of a mips32 code block
doesn't work. Make gcc built the magic crt stuff in no-mips16 mode.

This is specific to 4.6-linaro but is probably portable to other gcc
flavors. Adding this to the t-libgcc-mips16 makefile fragment is a
hack not suitable for pushing upstream, but there is no mips/t-linux
or mips/t-uclibc and I am not going to touch gcc/configure for two
lines.

Signed-off-by: Jay Carlson <nop@nop.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 36200

toolchain/gcc/patches/4.6-linaro/900-bad-mips16-crt

+--- gcc/gcc/config/mips/t-libgcc-mips16~	2013-03-26 09:09:34.209077496 -0400
++++ gcc/gcc/config/mips/t-libgcc-mips16	2013-03-26 18:21:01.717303669 -0400
+@@ -43,3 +43,6 @@
+ 
+ # Version these symbols if building libgcc.so.
+ SHLIB_MAPFILES += $(srcdir)/config/mips/libgcc-mips16.ver
++
++CRTSTUFF_T_CFLAGS += -mno-mips16
++CRTSTUFF_T_CFLAGS_S += -mno-mips16