coccinelle: Add script to remove redundant semicolon

This script allowes to remove the redundant semicolon from
`if`, `switch`, `while`, `for` statements.

Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>

scripts/coccinelle/semicolon.cocci

@@ -0,0 +1,83 @@
+///
+/// Remove unneeded semicolon.
+///
+// Confidence: Moderate
+// Copyright: (C) 2012 Peter Senna Tschudin, INRIA/LIP6.  GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments: Some false positives on empty default cases in switch statements.
+// Options: --no-includes --include-headers
+
+virtual patch
+virtual report
+virtual context
+virtual org
+
+@r_default@
+position p;
+@@
+switch (...)
+{
+default: ...;@p
+}
+
+@r_case@
+position p;
+@@
+(
+switch (...)
+{
+case ...:;@p
+}
+|
+switch (...)
+{
+case ...:...
+case ...:;@p
+}
+|
+switch (...)
+{
+case ...:...
+case ...:
+case ...:;@p
+}
+)
+
+@r1@
+statement S;
+position p1;
+position p != {r_default.p, r_case.p};
+identifier label;
+@@
+(
+label:;
+|
+S@p1;@p
+)
+
+@script:python@
+p << r1.p;
+p1 << r1.p1;
+@@
+if p[0].line != p1[0].line_end:
+	cocci.include_match(False)
+
+@depends on patch@
+position r1.p;
+@@
+-;@p
+
+@script:python depends on report@
+p << r1.p;
+@@
+coccilib.report.print_report(p[0],"Unneeded semicolon")
+
+@depends on context@
+position r1.p;
+@@
+*;@p
+
+@script:python depends on org@
+p << r1.p;
+@@
+cocci.print_main("Unneeded semicolon",p)