libjpeg-turbo: add -fomit-frame-pointer to DEBUG_OPTIMIZATION for armv[45] with thumb...

libjpeg-turbo: add -fomit-frame-pointer to DEBUG_OPTIMIZATION for armv[45] with thumb enabled

with thumb and debug enabled libjpeg-turbo gets stuck forever
when building for qemuarm.

libjpeg-turbo gets stuck in:
libjpeg-turbo/1_1.5.3-r0/build$ arm-webos-linux-gnueabi-gcc -march=armv5te -mthumb -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security --sysroot=libjpeg-turbo/1_1.5.3-r0/recipe-sysroot -DHAVE_CONFIG_H -I. -I../libjpeg-turbo-1.5.3 -Wall -O -fno-omit-frame-pointer -g -feliminate-unused-debug-types -pipe -c ../libjpeg-turbo-1.5.3/turbojpeg.c  -fPIC -DPIC -o .libs/libturbojpeg_la-turbojpeg.o

when -mthumb, -fstack-protector-strong, -fno-omit-frame-pointer appear
together, removing one of them is enough for successful build.

similar to:
http://lists.openembedded.org/pipermail/openembedded-core/2018-May/150654.html
but in this case the build gets stuck instead of failure

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>