Add .hpp files to sgrep and treegrep

There are plenty of .hpp files in the AOSP sources.

    $ find . -name \*.hpp | wc -l
    2430

They were already grepped in cgrep(), but were missing in
sgrep and treegrep.

Test: manual - run the script

Change-Id: I1fb3f576f6cdcc2b492e2beadf11ced98cb3938e
diff --git a/envsetup.sh b/envsetup.sh
index a4d950e..387a9ca 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -1109,7 +1109,7 @@
     Darwin)
         function sgrep()
         {
-            find -E . -name .repo -prune -o -name .git -prune -o  -type f -iregex '.*\.(c|h|cc|cpp|S|java|xml|sh|mk|aidl|vts)' \
+            find -E . -name .repo -prune -o -name .git -prune -o  -type f -iregex '.*\.(c|h|cc|cpp|hpp|S|java|xml|sh|mk|aidl|vts)' \
                 -exec grep --color -n "$@" {} +
         }
 
@@ -1117,7 +1117,7 @@
     *)
         function sgrep()
         {
-            find . -name .repo -prune -o -name .git -prune -o  -type f -iregex '.*\.\(c\|h\|cc\|cpp\|S\|java\|xml\|sh\|mk\|aidl\|vts\)' \
+            find . -name .repo -prune -o -name .git -prune -o  -type f -iregex '.*\.\(c\|h\|cc\|cpp\|hpp\|S\|java\|xml\|sh\|mk\|aidl\|vts\)' \
                 -exec grep --color -n "$@" {} +
         }
         ;;
@@ -1182,7 +1182,7 @@
 
         function treegrep()
         {
-            find -E . -name .repo -prune -o -name .git -prune -o -type f -iregex '.*\.(c|h|cpp|S|java|xml)' \
+            find -E . -name .repo -prune -o -name .git -prune -o -type f -iregex '.*\.(c|h|cpp|hpp|S|java|xml)' \
                 -exec grep --color -n -i "$@" {} +
         }
 
@@ -1196,7 +1196,7 @@
 
         function treegrep()
         {
-            find . -name .repo -prune -o -name .git -prune -o -regextype posix-egrep -iregex '.*\.(c|h|cpp|S|java|xml)' -type f \
+            find . -name .repo -prune -o -name .git -prune -o -regextype posix-egrep -iregex '.*\.(c|h|cpp|hpp|S|java|xml)' -type f \
                 -exec grep --color -n -i "$@" {} +
         }