8311227: Add .editorconfig

Co-authored-by: David Briemann <[email protected]>
Reviewed-by: erikj

Author: magicus

.editorconfig

@@ -0,0 +1,7 @@
+root = true
+
+[*.{cpp,hpp,c,h,java,cc,hh,m,mm,S,md,properties,gmk,m4,ac}]
+trim_trailing_whitespace = true
+
+[Makefile]
+trim_trailing_whitespace = true

src/hotspot/.editorconfig

@@ -0,0 +1,3 @@
+[*.{cpp,hpp,c,h}]
+indent_style = space
+indent_size = 2