package/php: Disable jit in bundled pcre library

Quote from ext/pcre/pcrelib/doc/pcre.txt
"This support is available only for certain hardware architectures. If
 this  option is set for an unsupported architecture, a compile time
 error occurs."

Disable jit support on unsupported archs by updating ext/pcre/pcrelib/config.h

Fixes
http://autobuild.buildroot.net/results/966/966d6c47d1ed13a90c2846d96fb3d193df4b2aaa/ (bfin)
http://autobuild.buildroot.net/results/3f5/3f53751b192078714860e64d3f6d8d7398433d5a/ (xtensa)
http://autobuild.buildroot.net/results/de1/de12474d2b5cce251b1ab10f7d7e28c90545a1f0/ (arcle)
http://autobuild.buildroot.net/results/358/358b54245bb48f653ce209be070bd5fe6b17afc4/ (microblazeel)
http://autobuild.buildroot.net/results/a7c/a7c161ca0b424ae35634c9f2d8a8111cedec8181/ (nios2)
http://autobuild.buildroot.net/results/dad/dad1128f58fc601bf96da5fa0635b9b9c6c8f0b8/

 (sh)

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>