Small tweaks to pcre and libllvm (#1103)

* pcre: add JIT functions

* libllvm: remove unnecessary dependency on Python 2.7

packages/libllvm/build.sh

@@ -38,7 +38,6 @@ TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 -DCLANG_TOOL_C_INDEX_TEST_BUILD=OFF
 -DC_INCLUDE_DIRS=$TERMUX_PREFIX/include
 -DLLVM_LINK_LLVM_DYLIB=ON
--DPYTHON_EXECUTABLE=`which python2.7`
 -DLLVM_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/llvm-tblgen
 -DCLANG_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/clang-tblgen"
 TERMUX_PKG_FORCE_CMAKE=yes

packages/pcre/build.sh

@@ -4,4 +4,4 @@ TERMUX_PKG_VERSION=8.40
 TERMUX_PKG_SRCURL=ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-${TERMUX_PKG_VERSION}.tar.bz2
 TERMUX_PKG_SHA256=00e27a29ead4267e3de8111fcaa59b132d0533cdfdbdddf4b0604279acbcf4f4
 TERMUX_PKG_RM_AFTER_INSTALL="bin/pcre-config bin/pcregrep bin/pcretest share/man/man1/pcre*.1 lib/libpcreposix.so lib/libpcreposix.so.0 lib/libpcreposix.so.0.0.2"
-TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-cpp --enable-utf8 --enable-unicode-properties"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-cpp --enable-jit --enable-utf8 --enable-unicode-properties"