component/gcc: enable default PIE
Revert eb1b1a41 to avoid the use of
fPIC flag as it is a "contagious" build option.
To not face the build error "relocation R_X86_64_32 against
.rodata.str1.8 can not be used when making a shared object; recompile
with -fPIC" while building a shared library without fPIC flag, gcc is
compiled with -enable-default-pie flag (which is a compilation option
used for gcc binaries provided by Debian by example, see gcc -v).