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

# D.U.M.A. - Detect Unintended Memory Access - Memory checker

## depends on ! BACKEND

## help D.U.M.A. - Detect Unintended Memory Access

## help A memory bound checker, with additional features.

## help Formerly known as Electric Fence.

config DUMA_A

    bool

    prompt "Build a static library"

    default y

config DUMA_SO

    bool

    prompt "Build a shared library"

    default y if SHARED_LIBS

choice

    bool

    prompt "D.U.M.A. version"

# Don't remove next line

# CT_INSERT_VERSION_BELOW

config DUMA_V_2_5_15

    bool

    prompt "2_5_15"

endchoice

config DUMA_VERSION

    string

# Don't remove next line

# CT_INSERT_VERSION_STRING_BELOW

    default "2_5_15" if DUMA_V_2_5_15