Call termux_setup_cmake before invoking cmake

This fixes build in an environment (e.g. the Docker image) without
cmake installed.

packages/clang/build.sh

@@ -42,6 +42,7 @@ termux_step_post_extract_package () {
 }
 
 termux_step_host_build () {
+	termux_setup_cmake
 	cmake -G "Unix Makefiles" $TERMUX_PKG_SRCDIR \
 		-DLLVM_BUILD_TESTS=OFF \
 		-DLLVM_INCLUDE_TESTS=OFF

packages/neovim/build.sh

@@ -10,6 +10,8 @@ TERMUX_PKG_EXTRA_CONFIGURE_ARGS="-DENABLE_JEMALLOC=OFF -DGPERF_PRG=$TERMUX_PKG_H
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DLUA_PRG=$TERMUX_PKG_HOSTBUILD_DIR/deps/usr/bin/luajit"
 
 termux_step_host_build () {
+	termux_setup_cmake
+
 	mkdir -p $TERMUX_PKG_HOSTBUILD_DIR/deps
 	cd $TERMUX_PKG_HOSTBUILD_DIR/deps
 	cmake $TERMUX_PKG_SRCDIR/third-party