7085 add support for "if" and "else" statements in dtrace

*** 113,124 ****
  #define DT_VERS_1_9_1   DT_VERSION_NUMBER(1, 9, 1)
  #define DT_VERS_1_10    DT_VERSION_NUMBER(1, 10, 0)
  #define DT_VERS_1_11    DT_VERSION_NUMBER(1, 11, 0)
  #define DT_VERS_1_12    DT_VERSION_NUMBER(1, 12, 0)
  #define DT_VERS_1_12_1  DT_VERSION_NUMBER(1, 12, 1)
! #define DT_VERS_LATEST  DT_VERS_1_12_1
! #define DT_VERS_STRING  "Sun D 1.12.1"
  
  const dt_version_t _dtrace_versions[] = {
          DT_VERS_1_0,    /* D API 1.0.0 (PSARC 2001/466) Solaris 10 FCS */
          DT_VERS_1_1,    /* D API 1.1.0 Solaris Express 6/05 */
          DT_VERS_1_2,    /* D API 1.2.0 Solaris 10 Update 1 */
--- 113,125 ----
  #define DT_VERS_1_9_1   DT_VERSION_NUMBER(1, 9, 1)
  #define DT_VERS_1_10    DT_VERSION_NUMBER(1, 10, 0)
  #define DT_VERS_1_11    DT_VERSION_NUMBER(1, 11, 0)
  #define DT_VERS_1_12    DT_VERSION_NUMBER(1, 12, 0)
  #define DT_VERS_1_12_1  DT_VERSION_NUMBER(1, 12, 1)
! #define DT_VERS_1_12_2  DT_VERSION_NUMBER(1, 12, 2)
! #define DT_VERS_LATEST  DT_VERS_1_12_2
! #define DT_VERS_STRING  "Sun D 1.12.2"
  
  const dt_version_t _dtrace_versions[] = {
          DT_VERS_1_0,    /* D API 1.0.0 (PSARC 2001/466) Solaris 10 FCS */
          DT_VERS_1_1,    /* D API 1.1.0 Solaris Express 6/05 */
          DT_VERS_1_2,    /* D API 1.2.0 Solaris 10 Update 1 */
*** 140,149 ****
--- 141,151 ----
          DT_VERS_1_9_1,  /* D API 1.9.1 */
          DT_VERS_1_10,   /* D API 1.10 */
          DT_VERS_1_11,   /* D API 1.11 */
          DT_VERS_1_12,   /* D API 1.12 */
          DT_VERS_1_12_1, /* D API 1.12.1 */
+         DT_VERS_1_12_2, /* D API 1.12.2 */
          0
  };
  
  /*
   * Table of global identifiers.  This is used to populate the global identifier