glsl: do not use deprecated bison-keyword

%error-verbose has been deprecated since Bison 3.0, which was released
in 2013. In Bison 3.3.1 which was recently released, this has started
causing warnings. Let's update the code to do this in the modern way
intead, to avoid cluttering the output needlessly.

Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/compiler/glsl/glcpp/glcpp-parse.y

@@ -155,7 +155,7 @@ add_builtin_define(glcpp_parser_t *parser, const char *name, int value);
 %}
 
 %pure-parser
-%error-verbose
+%define parse.error verbose
 
 %locations
 %initial-action {

src/compiler/glsl/glsl_parser.yy

@@ -81,7 +81,7 @@ static bool match_layout_qualifier(const char *s1, const char *s2,
 %expect 0
 
 %pure-parser
-%error-verbose
+%define parse.error verbose
 
 %locations
 %initial-action {

src/mesa/program/program_parse.y

@@ -124,7 +124,7 @@ static struct asm_instruction *asm_instruction_copy_ctor(
 %locations
 %lex-param   { struct asm_parser_state *state }
 %parse-param { struct asm_parser_state *state }
-%error-verbose
+%define parse.error verbose
 
 %union {
    struct asm_instruction *inst;