This is by no means a built_source, and it should not be cleaned.
Fixes T1148.
lib_ecore_x_libecore_x_la_DEPENDENCIES = @ECORE_X_INTERNAL_LIBS@
lib_ecore_x_libecore_x_la_LDFLAGS = @EFL_LTLIBRARY_FLAGS@
-MAINTAINERCLEANFILES += \
-$(top_builddir)/src/lib/ecore_x/ecore_x_version.h
-
-BUILT_SOURCES += \
-$(top_builddir)/src/lib/ecore_x/ecore_x_version.h
-
if HAVE_ECORE_X_XCB
MAINTAINERCLEANFILES += \
$(top_builddir)/src/lib/ecore_x/xcb/ecore_xcb_keysym_table.h \