use pcre.jit only if enabled

[remicollet]

We have a buildtime option HAVE_PCRE_JIT_SUPPORT and a runtime option for pcre2 jit usage PCRE_G(jit)

This fix check for both in opcache.

Bug: when selinux, jit doesn't work, but even with pcre.jit=0, when opcache is enabled, a AVC is raised

type=AVC msg=audit(1611840254.138:10844): avc: denied { execmem } for pid=328163 comm="php-fpm" scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:system_r:httpd_t:s0 tclass=process permissive=1

[remicollet]

@cmb69 as you are the pcre2 change owner ;)
@nikic as this is a trivial fix

[nikic]

Looks reasonable.

[nikic]

@cmb69 Unrelated to the PR, looks like Windows build is borked?

libzip_a.lib(zip_algorithm_xz.obj) : error LNK2001: unresolved external symbol lzma_code
libzip_a.lib(zip_algorithm_xz.obj) : error LNK2001: unresolved external symbol lzma_end
libzip_a.lib(zip_algorithm_xz.obj) : error LNK2001: unresolved external symbol lzma_lzma_preset
libzip_a.lib(zip_algorithm_xz.obj) : error LNK2001: unresolved external symbol lzma_stream_encoder
libzip_a.lib(zip_algorithm_xz.obj) : error LNK2001: unresolved external symbol lzma_alone_encoder
libzip_a.lib(zip_algorithm_xz.obj) : error LNK2001: unresolved external symbol lzma_stream_decoder
libzip_a.lib(zip_algorithm_xz.obj) : error LNK2001: unresolved external symbol lzma_alone_decoder
C:\obj\Release\php7.dll : fatal error LNK1120: 7 unresolved externals

[remicollet]

Fixed in 7.4+ by 067f7e4 and aeb4f21

[cmb69]

Unrelated to the PR, looks like Windows build is borked?

It's because Remi had changed the branch in GH UI, but likely hadn't rebased. AppVeyor gets confused by that.

[kwizart]

Tested, this fixes the reported issue with execmem with SELinux enforced