component/pcre: don't enable jit on RISC-V

INFO     pcre_jit_compile.c:65:2: error: #error Unsupported architecture
INFO        65 | #error Unsupported architecture
INFO           |  ^~~~~

See https://github.com/luvit/pcre/blob/5c78f7d5d7f41bdd4be4867ef3a1030af3e973e3/pcre_jit_compile.c#L65

component/pcre/buildout.cfg

@@ -12,9 +12,13 @@ md5sum = 4452288e6a0eefb2ab11d36010a1eebb
 configure-options =
   --disable-static
   --enable-unicode-properties
-  --enable-jit
 patch-options = -p1
 patches =
   https://sources.debian.org/data/main/p/pcre3/2:8.39-12/debian/patches/patch-from-mariadb-to-fix-stack-frame-si#c33964123a4648bbb86466b4f3476bb4
 environment =
   PATH=${patch:location}/bin:%(PATH)s
+
+[pcre:not linux or platform.machine() != 'riscv64']
+configure-options +=
+  --enable-jit
+