mc: fix build with local libpcre2-dev package

Since pcre2 was introduced in mc, it doesn't build on host systems
where libpcre2-dev is installed locally.

Add a configure option to point to the sysroot, where mc should search
for pcre2.

Signed-off-by: Andreas Baierl <ichgeh@imkreisrum.de>

packages/addons/addon-depends/system-tools-depends/mc/package.mk

@@ -34,6 +34,7 @@ PKG_CONFIGURE_OPTS_TARGET=" \
   --enable-vfs-sftp \
   --enable-vfs-tar \
   --with-search-engine=pcre2 \
+  --with-pcre2=${SYSROOT_PREFIX}/usr \
   --without-x"
 
 pre_configure_target() {