Update gitignore for some common output files

Change-Id: I9cd60f042af4dba07fe0fdbd2ee442936ff8c7bd

.gitignore

@@ -1,4 +1,5 @@
 .*
+!.gitignore
 *.o
 *.exe
 *.swp

samples/0_Intro/hcc_dialects/.gitignore

@@ -0,0 +1,5 @@
+vadd_amp_arrayview
+vadd_hc_am
+vadd_hc_array
+vadd_hc_arrayview
+vadd_hip

samples/0_Intro/module_api/.gitignore

@@ -0,0 +1,5 @@
+runKernel.hip.out
+vcpy_isa.code
+vcpy_isa.hsaco
+vcpy_kernel.co
+vcpy_kernel.code