Update verilog-mode.el to 2015-05-14-6232468-vpo-GNU.

Update verilog-mode.el to 2015-05-14-6232468-vpo-GNU.

    * losp/progmodes/verilog-mode.el: Fix some non-automated indent
    issues and comments, bug943.  (verilog-type-font-keywords): Cycle
    delay operators like ##1 and ##[0:$] are now highlighted in their
    entirety similarly to the # delay-control operator.  Likewise, the
    followed-by operators #-# and #=# are no longer partially
    highlighed.  (verilog-backward-syntactic-ws-quick,
    verilog-skip-backward-comments): Minor performance improvements to
    buffer traversal functions for reduced latency.  (verilog-calc-1,
    verilog-in-deferred-immediate-final-p): When the keyword 'final'
    follows 'assert/assume/cover', then it is part of a deferred
    immediate assertion item and should not be treated as a final
    construct for indentation.  Reported by Yuri Sugihara.
    (verilog-do-indent): Virtual task/function/class definition lines
    should not be considered as declarations.  Reported by Enzo Chi.
    (verilog-do-indent): Do not falsely indent to '=' of
    property/sequence operators on subsequent lines of a multi-line
    statement.  (verilog-assignment-operator-re): Fix '!==' operator
    and add support for '<->', ':/', '#-#', and '#=#' operators.
    (verilog-calculate-indent, verilog-label-be): Enable
    case-sensitive regular expression parsing when looking for
    keywords.  (verilog-calc-1): Detect 'pure virtual method'
    declarations which exist in abstract classes.  Reported by Enzo
    Chi and Kaushal Modi.  (verilog-backward-ws&directives): When
    moving back to the start of a line and the preceeding line ended
    with an escaped-newline, then jump up one line.  This properly
    consumes a multi-line pre-processor directive.  Reported by
    Kaushal Modi.  (verilog-dpi-import-export-re,
    verilog-extended-complete-re, verilog-calc-1): Teach verilog-mode
    to properly indent after a DPI import/export statement that
    resides outside of a module.  Reported by Kaushal Modi.
    (verilog-extended-complete-re): Update regexp to match both
    "DPI-C" and "DPI".  Reported by Kaushal Modi.