Organize public and internal parts of memory management (#1539)

* Introduced new 'jmem.h' for public part.
 * Removed obsolete headers

JerryScript-DCO-1.0-Signed-off-by: László Langó llango.u-szeged@partner.samsung.com

jerry-core/parser/js/common.h

@@ -34,7 +34,7 @@
 
 #include "ecma-globals.h"
 #include "ecma-regexp-object.h"
-#include "jmem-heap.h"
+#include "jmem.h"
 
 /* Immediate management. */
 

jerry-core/parser/regexp/re-compiler.c

@@ -19,7 +19,7 @@
 #include "ecma-try-catch-macro.h"
 #include "jcontext.h"
 #include "jrt-libc-includes.h"
-#include "jmem-heap.h"
+#include "jmem.h"
 #include "re-bytecode.h"
 #include "re-compiler.h"
 #include "re-parser.h"