glib: disable valgrind support when compiling in mips16e mode

glib: disable valgrind support when compiling in mips16e mode

| mipsel-poky-linux-uclibc-gcc -mel -mabi=32 -msoft-float \
|   -march=mips32r2 -mips16 -minterlink-compressed -mtune=24kec \
|   -mdsp --sysroot=<sysroot> -DHAVE_CONFIG_H -I. \
|   -I<glib>/glib -I.. -I.. -I../glib -I<glib>/glib -I<glib> \
|   -DG_LOG_DOMAIN=\"GLib\" -DG_DISABLE_CAST_CHECKS -DGLIB_COMPILATION \
|   -DPCRE_STATIC -pthread -Wall -Wstrict-prototypes \
|   -Werror=declaration-after-statement -Werror=missing-prototypes \
|   -Werror=implicit-function-declaration -Werror=pointer-arith \
|   -Werror=init-self -Werror=format=2 -Werror=missing-include-dirs \
|   -fvisibility=hidden -O2 -pipe -g -feliminate-unused-debug-types \
|   -c <glib>/glib/gslice.c  -fPIC -DPIC -o .libs/libglib_2_0_la-gslice.o
| {standard input}: Assembler messages:
| {standard input}:2485: Error: invalid operands `move $11,$8'
| {standard input}:2487: Error: invalid operands `srl $0,$0,13'
| {standard input}:2488: Error: invalid operands `srl $0,$0,29'
| {standard input}:2489: Error: invalid operands `srl $0,$0,3'
| {standard input}:2490: Error: invalid operands `srl $0,$0,19'
| {standard input}:2491: Error: invalid operands `or $13,$13,$13'
| Makefile:2076: recipe for target 'libglib_2_0_la-gslice.lo' failed

The alternative would probably be to force compilation in normal mips
mode for all of glib (as is done for armv4 and armv5). While that
would retain the valgrind support, valgrind support itself shouldn't
be needed on the target device, and we rather keep the mips16e mode.

Signed-off-by: André Draszik <adraszik@tycoint.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>