* meson.build: s/freetype2_dep/freetype_dep/.

Many projects (e.g., fontconfig, cairo) hardcode the `freetype_dep`
variable name to use FreeType as subproject because that was the
variable name in Centricular's Meson port of FreeType.  While they
should stop hardcoding that variable name, it does not cost us
anything to keep using that name to ease transition.

ChangeLog

@@ -1,3 +1,13 @@
+2021-02-09  Xavier Claessens  <xavier.claessens@collabora.com>
+
+	* meson.build: s/freetype2_dep/freetype_dep/.
+
+	Many projects (e.g., fontconfig, cairo) hardcode the `freetype_dep`
+	variable name to use FreeType as subproject because that was the
+	variable name in Centricular's Meson port of FreeType.  While they
+	should stop hardcoding that variable name, it does not cost us
+	anything to keep using that name to ease transition.
+
 2021-02-09  Xavier Claessens  <xavier.claessens@collabora.com>
 
 	[meson] Fix handling of HarfBuzz library.

meson.build

@@ -327,11 +327,11 @@ ft2_lib = library('freetype',
 
 
 # To be used by other projects including this one through subproject().
-freetype2_dep = declare_dependency(
+freetype_dep = declare_dependency(
   include_directories: ft2_includes,
   link_with: ft2_lib,
   version: ft2_pkgconfig_version)
-meson.override_dependency('freetype2', freetype2_dep)
+meson.override_dependency('freetype2', freetype_dep)
 
 
 # NOTE: Using both `install_dir` and `subdir` doesn't seem to work below,