cc/gcc: fix parallel build with gcc 4.8.0, 4.8.1 and 4.8.2

Fix the problem with parallel build on gcc 4.8.0, 4.8.1 and 4.8.2
See: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57683

and

http://gcc.gnu.org/viewcvs?rev=205189&root=gcc&view=rev
Log:
2013-11-21 Zhenqiang Chen <zhenqiang.chen@linaro.org>

PR bootstrap/57683
Backport from mainline: r197467 and r198999.
2013-04-03 Jeff Law <law@redhat.com>

* Makefile.in (lra-constraints.o): Depend on $(OPTABS_H).
(lra-eliminations.o): Likewise.

2013-05-16 Jeff Law <law@redhat.com>

* Makefile.in (tree-switch-conversion.o): Depend on $(OPTABS_H).

Signed-off-by: "Daniel Zimmermann" <netzimme@gmail.com>
Message-Id: <66398633eea949023e0d.1385290839@haus-VirtualBox>
Patchwork-Id: 293742

CT_EXPERIMENTAL=y

CT_LOCAL_TARBALLS_DIR="${HOME}/src"

CT_SAVE_TARBALLS=y

CT_ARCH_CPU="e300c3"

CT_ARCH_TUNE="e300c3"

CT_ARCH_powerpc=y

CT_TARGET_VENDOR="e300c3"

CT_KERNEL_linux=y

CT_KERNEL_V_2_6_36=y

CT_BINUTILS_V_2_21_1a=y

CT_BINUTILS_FOR_TARGET=y

CT_CC_V_4_5_2=y

CT_CC_LANG_CXX=y

CT_CC_EXTRA_CONFIG_ARRAY="--with-long-double-128"

# CT_CC_GCC_ENABLE_TARGET_OPTSPACE is not set

# CT_CC_GCC_SJLJ_EXCEPTIONS is not set

CT_LIBC_EGLIBC_V_2_12=y

# CT_LIBC_GLIBC_FORCE_UNWIND is not set

CT_LIBC_GLIBC_USE_PORTS=y

CT_GMP_V_5_0_1=y

CT_MPFR_V_3_0_0=y

CT_CLOOG_V_0_15_10=y

CT_MPC_V_0_8_2=y