debug/strace: pump version to 4.7 and 4.8

Pump version for strace to 4.7 and 4.8.
Add patch from strace mainline.


Work around conflict between <sys/ptrace.h> and <linux/ptrace.h>

Since glibc-2.18~39 <sys/ptrace.h> defines ptrace_peeksiginfo_args
which collides with <linux/ptrace.h>.

* configure.ac: Check for `struct ptrace_peeksiginfo_args' in
<sys/ptrace.h>.
* process.c: Work around potential conflict between <sys/ptrace.h>
and <linux/ptrace.h> by redefining ptrace_peeksiginfo_args.
* signal.c: Likewise.
* syscall.c: Likewise.
* util.c: Likewise.
http://sourceforge.net/p/strace/code/ci/0b4060f61f1bb101b5d8d084714b7d2feacdb199/

Signed-off-by: "Daniel Zimmermann" <netzimme@gmail.com>
Message-Id: <67b082cf1cdc8276eb4a.1385366288@haus-VirtualBox>
Patchwork-Id: 293842

 CT_EXPERIMENTAL=y

 CT_LOCAL_TARBALLS_DIR="${HOME}/src"

 CT_SAVE_TARBALLS=y

 CT_LOG_EXTRA=y

 CT_ARCH_mips=y

 CT_TARGET_VENDOR="malta"

 CT_KERNEL_linux=y

 CT_KERNEL_V_2_6_38=y

 CT_BINUTILS_V_2_21_1a=y

 CT_CC_V_4_4_6=y

 # CT_CC_GCC_USE_GRAPHITE is not set

 CT_LIBC_EGLIBC_V_2_13=y

 CT_DEBUG_gdb=y

 # CT_GDB_GDBSERVER_STATIC is not set

 CT_GDB_V_7_2a=y

 CT_GMP_V_5_0_1=y

 CT_MPFR_V_3_0_0=y

 CT_TEST_SUITE_GCC=y