Use guix-provided qjs instead of a meson subproject.

Patch by bdunahu <bdunahu@operationnull.com>.

diff --git a/libr/lang/meson.build b/libr/lang/meson.build
index b84a187af7..2d96b8a7cf 100644
--- a/libr/lang/meson.build
+++ b/libr/lang/meson.build
@@ -4,9 +4,8 @@ r_lang_sources = [

 spp_inc = [platform_inc, include_directories('../../shlr/spp')]

-qjs = subproject('qjs')
-qjs_inc = qjs.get_variable('incs')
-qjs_static = qjs.get_variable('qjs_static')
+qjs_dep = cc.find_library('qjs', required: true)
+
 r_lang_pkgcfg_private_libs = []
 if mth.found()
   r_lang_pkgcfg_private_libs += ['-lm']
@@ -14,7 +13,7 @@ endif


 r_lang = library('r_lang', r_lang_sources,
-  include_directories: [platform_inc, spp_inc, qjs_inc],
+  include_directories: [platform_inc, spp_inc],
   c_args: library_cflags,
   dependencies: [
     r_util_dep,
@@ -25,15 +24,15 @@ r_lang = library('r_lang', r_lang_sources,
     r_esil_dep,
     r_muta_dep,
     r_cons_dep,
+    qjs_dep,
   ],
-  link_with: qjs_static,
   install: true,
   implicit_include_directories: false,
   install_rpath: rpath_lib,
   soversion: r2_libversion
 )

-r_lang_dep = declare_dependency(link_with: r_lang, include_directories: [platform_inc, qjs_inc])
+r_lang_dep = declare_dependency(link_with: r_lang, include_directories: [platform_inc], dependencies: [qjs_dep])

 if get_option('blob')
 r_lang_static = static_library('r_lang_static', r_lang_sources,