Memory leak issue on awt_InputMethod.c.

See src/java.desktop/unix/native/libawt_xawt/awt/awt_InputMethod.c.
On line 1117, memory area was allocated by malloc(), but free() is missing
===========================================
  1099 if (text->feedback != NULL) {
  1100 int cnt;
  1101 jint *tmpstyle;
  1102
  1103 style = (*env)->NewIntArray(env, text->length);
  1104 if (JNU_IsNull(env, style)) {
  1105 (*env)->ExceptionClear(env);
  1106 THROW_OUT_OF_MEMORY_ERROR();
  1107 goto finally;
  1108 }
  1109
  1110 if (sizeof(XIMFeedback) == sizeof(jint)) {
  1111 /*
  1112 * Optimization to avoid copying the array
  1113 */
  1114 (*env)->SetIntArrayRegion(env, style, 0,
  1115 text->length, (jint *)text->feedback);
  1116 } else {
  1117 tmpstyle = (jint *)malloc(sizeof(jint)*(text->length));
  1118 if (tmpstyle == (jint *) NULL) {
  1119 THROW_OUT_OF_MEMORY_ERROR();
  1120 goto finally;
  1121 }
  1122 for (cnt = 0; cnt < (int)text->length; cnt++)
  1123 tmpstyle[cnt] = text->feedback[cnt];
  1124 (*env)->SetIntArrayRegion(env, style, 0,
  1125 text->length, (jint *)tmpstyle);
  1126 }
  1127 }
===========================================

RFR:
http://mail.openjdk.java.net/pipermail/awt-dev/2018-October/014390.html

Reviewers
http://mail.openjdk.java.net/pipermail/awt-dev/2018-October/014391.html
http://mail.openjdk.java.net/pipermail/awt-dev/2018-October/014415.html