gawk: Enable native building

Also update the ASSUME_PROVIDED in bitbake.conf to contain gawk-native as the dependency is passed in via HOSTTOOLS for native builds.

This allows for recipes to depend on gawk-native, and have the dependency met if not already provided by the host tools.

---
 meta/conf/bitbake.conf                   | 1 +
 meta/recipes-extended/gawk/gawk_4.1.4.bb | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

index 8ce08340d7..3669067863 100644
@@ -176,6 +176,7 @@ ASSUME_PROVIDED = "\
     chrpath-native \
     file-native \
     findutils-native \
+    gawk-native \
     git-native \
     grep-native \
     diffstat-native \

index dda38ef1bb..04451f7ff8 100644
@@ -46,4 +46,4 @@ do_install_ptest() {
 	done
 }
 
-BBCLASSEXTEND = "nativesdk"
+BBCLASSEXTEND = "native nativesdk"

2.14.1