Tweak "header has symbol" message

Change message

    Header <foo.h> has symbol "BAR"

to

    Header "foo.h" has symbol "BAR"

with the first part also now in bold.  This is more consistent with
other messages like

    Has header "foo.h"

and

    Checking whether type "foo" has member "bar"

mesonbuild/interpreter/compiler.py

@@ -533,7 +533,7 @@ class CompilerHolder(ObjectHolder['Compiler']):
         hname, symbol = args
         disabled, required, feature = extract_required_kwarg(kwargs, self.subproject, default=False)
         if disabled:
-            mlog.log(f'Header <{hname}> has symbol', mlog.bold(symbol, True), 'skipped: feature', mlog.bold(feature), 'disabled')
+            mlog.log('Header', mlog.bold(hname, True), 'has symbol', mlog.bold(symbol, True), 'skipped: feature', mlog.bold(feature), 'disabled')
             return False
         extra_args = functools.partial(self._determine_args, kwargs['no_builtin_args'], kwargs['include_directories'], kwargs['args'])
         deps, msg = self._determine_dependencies(kwargs['dependencies'])
@@ -547,7 +547,7 @@ class CompilerHolder(ObjectHolder['Compiler']):
         else:
             h = mlog.red('NO')
         cached_msg = mlog.blue('(cached)') if cached else ''
-        mlog.log(f'Header <{hname}> has symbol', mlog.bold(symbol, True), msg, h, cached_msg)
+        mlog.log('Header', mlog.bold(hname, True), 'has symbol', mlog.bold(symbol, True), msg, h, cached_msg)
         return haz
 
     def notfound_library(self, libname: str) -> 'dependencies.ExternalLibrary':