build: Generate toolchain.cmake in depends

depends/funcs.mk

@@ -171,7 +171,7 @@ $(1)_autoconf += LDFLAGS="$$($(1)_ldflags)"
 endif
 
 # We hardcode the library install path to "lib" to match the PKG_CONFIG_PATH
-# setting in depends/config.site.in, which also hardcodes "lib".
+# setting in depends/toolchain.cmake.in, which also hardcodes "lib".
 # Without this setting, CMake by default would use the OS library
 # directory, which might be "lib64" or something else, not "lib", on multiarch systems.
 $(1)_cmake=env CC="$$($(1)_cc)" \