fcitx: revert using libexecinfo

Closes: #12594 [via git-merge-pr]

srcpkgs/fcitx/patches/execinfo.patch

@@ -0,0 +1,12 @@
+--- CMakeLists.txt.bak	2017-12-02 13:38:52.784843265 +0100
++++ src/CMakeLists.txt	2017-12-02 13:39:15.028841808 +0100
+@@ -1,6 +1,8 @@
+ include_directories(${LIBINTL_INCLUDE_DIR})
+ include_directories(${LIBICONV_INCLUDE_DIR})
+-include_directories(${LIBEXECINFO_INCLUDE_DIR})
++if(ENABLE_BACKTRACE)
++	include_directories(${LIBEXECINFO_INCLUDE_DIR})
++endif()
+ include_directories(${DL_INCLUDE_DIR})
+ include_directories(${PTHREAD_INCLUDE_DIR})
+ 

srcpkgs/fcitx/template

@@ -1,7 +1,7 @@
 # Template file for 'fcitx'
 pkgname=fcitx
 version=4.2.9.6
-revision=2
+revision=3
 build_style=cmake
 short_desc="Flexible Context-aware Input Tool with eXtension"
 maintainer="Robert La Spina <rkidlaspina@gmail.com>"
@@ -19,7 +19,7 @@ configure_args="-DSYSCONFDIR=/etc -DFORCE_OPENCC=OFF -DFORCE_PRESAGE=OFF
  -DFORCE_ENCHANT=ON"
 
 case "$XBPS_TARGET_MACHINE" in
-	*-musl) makedepends+=" libexecinfo-devel";;
+	*-musl) configure_args+=" -DENABLE_BACKTRACE=OFF";;
 esac
 
 if [ "$CROSS_BUILD" ]; then