packaging: Add -fPIC flag to perf build cflags

packaging: Add -fPIC flag to perf build cflags

Current Tizen build environment requires -fPIC with relocation
and without the flag, there is build error for perf like below:

  armv7l
    armv7l-tizen-linux-gnueabi/bin/ld: perf-in.o: relocation R_ARM_MOVW_ABS_NC against `__stack_chk_guard' can not be used when making a shared object; recompile with -fPIC

  aarch64
    aarch64-tizen-linux-gnu/bin/ld: perf-in.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against external symbol `__stack_chk_guard@@GLIBC_2.17' can not be used when making a shared object; recompile with -fPIC
    aarch64-tizen-linux-gnu/bin/ld: perf-in.o(.text+0x4): unresolvable R_AARCH64_ADR_PREL_PG_HI21 relocation against symbol `__stack_chk_guard@@GLIBC_2.17'

Add -fPIC flag to perf build.

Change-Id: Icca04801698c88180dfde493a3ef92e5c01612b5
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>