meta-ti-bsp: add mesa to SIGGEN_EXCLUDERECIPES_ABISAFE list

For TI platforms with SGX and Rogue graphics we patch upstream Mesa with
PVR support and conditionally enable features based on virtual/gpudriver
preference. This makes Mesa package platform-specific and it contains the
corresponding PACKAGE_ARCH = "${MACHINE_ARCH}" line.

In order to get greater re-use from generic non-machine-speciofic packages
down the dependency chain, such as Wayland, Weston, Qt5 modules, etc. we
need to mark mesa recipe as still providing stable OpenGL ABIs, such as
EGL, GLES, GBM, etc. - add it to SIGGEN_EXCLUDERECIPES_ABISAFE list.

Signed-off-by: Denys Dmytriyenko <denys@konsulko.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Signed-off-by: Ryan Eatmon <reatmon@ti.com>

meta-ti-bsp/conf/layer.conf

@@ -19,6 +19,7 @@ LAYERDEPENDS_meta-ti-bsp = " \
 "
 
 SIGGEN_EXCLUDERECIPES_ABISAFE += " \
+    mesa \
 "
 
 HOSTTOOLS_NONFATAL += "truncate xxd comm"