complibs/ppl: only add -fpermissive flag to CXXFLAGS

-fpermissive is not a valid option to gcc.

Adding it to the CFLAGS make the ppl checks fail with the following
error:

[ALL ] Making check in tests
[ALL ] cc1: warnings being treated as errors
[ERROR] cc1: error: command line option "-fpermissive" is valid for C++/ObjC++ but not for C
[ALL ] cc1: warnings being treated as errors
[ERROR] cc1: error: command line option "-fpermissive" is valid for C++/ObjC++ but not for C
[ERROR] make[7]: *** [formatted_output.o] Error 1

Signed-off-by: "Samuel Martin" <smartin@aldebaran-robotics.com>
Message-Id: <bba2482a06a11415207e.1365876457@smartin-de-2.aldebaran.lan>
Patchwork-Id: 236383

CT_LOCAL_TARBALLS_DIR="${HOME}/src"

CT_SAVE_TARBALLS=y

CT_LOG_EXTRA=y

CT_ARCH_CPU="405"

CT_ARCH_TUNE="405"

CT_ARCH_FLOAT_SW=y

CT_ARCH_powerpc=y

CT_TARGET_VENDOR="405"

CT_KERNEL_linux=y

CT_KERNEL_V_2_6_31=y

CT_BINUTILS_V_2_19_1a=y

CT_BINUTILS_FOR_TARGET=y

CT_CC_V_4_3_2=y

CT_CC_LANG_FORTRAN=y

CT_CC_LANG_CXX=y

CT_CC_LANG_JAVA=y

CT_LIBC_glibc=y

CT_LIBC_GLIBC_V_2_9=y

# CT_LIBC_GLIBC_FORCE_UNWIND is not set

CT_LIBC_GLIBC_USE_PORTS=y

CT_DEBUG_dmalloc=y

CT_DEBUG_duma=y

CT_DEBUG_gdb=y

CT_GDB_NATIVE=y

CT_GDB_V_6_8a=y

CT_GMP_V_4_3_2=y

CT_MPFR_V_2_4_2=y