weechat: Fix build in some cross-build environment

Build system incorrectly picked up `libgcrypt-config` for build host.
Note that `*-config` script hack in `termux_step_configure_autotools`
does not apply when e.g. CMake or Meson is used as the build system.

%ci:no-build

packages/weechat/build.sh

@@ -29,6 +29,7 @@ TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 -DMSGFMT_EXECUTABLE=$(command -v msgfmt)
 -DMSGMERGE_EXECUTABLE=$(command -v msgmerge)
 -DXGETTEXT_EXECUTABLE=$(command -v xgettext)
+-DLIBGCRYPT_CONFIG_EXECUTABLE=$TERMUX_PREFIX/bin/libgcrypt-config
 "
 
 termux_step_pre_configure() {

packages/weechat/cmake-FindGCRYPT.cmake.patch

@@ -0,0 +1,10 @@
+--- a/cmake/FindGCRYPT.cmake
++++ b/cmake/FindGCRYPT.cmake
+@@ -27,7 +27,6 @@
+ #  GCRYPT_LDFLAGS = ldflags to use to compile
+ #
+ 
+-find_program(LIBGCRYPT_CONFIG_EXECUTABLE NAMES libgcrypt-config)
+ 
+ set(GCRYPT_LDFLAGS)
+ set(GCRYPT_CFLAGS)