Add two missing extensions to extension.txt (#1162)

Change-Id: I44c78179ad6cfe9fc6da656aee72cae7adc0bf90

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

Author: kpet

extensions/extensions.txt

@@ -40,6 +40,8 @@ include::cl_ext_float_atomics.asciidoc[]
 <<<
 include::cl_ext_image_from_buffer.asciidoc[]
 <<<
+include::cl_ext_image_raw10_raw12.asciidoc[]
+<<<
 include::cl_ext_image_requirements_info.asciidoc[]
 
 // Vendor Extensions
@@ -61,6 +63,8 @@ include::cl_arm_scheduling_controls.asciidoc[]
 <<<
 include::cl_img_cached_allocations.asciidoc[]
 <<<
+include::cl_img_cancel_command.asciidoc[]
+<<<
 include::cl_img_generate_mipmap.asciidoc[]
 <<<
 include::cl_img_mem_properties.asciidoc[]