tools/hex2hcd: fix musl compatibility

The call to basename() relies on a GNU extension
to take a const char * vs a char *. Let's define
a trivial helper function to ensure compatibility
with musl.

Downstream gentoo bug: https://bugs.gentoo.org/926344
Fixes: #843

---
 tools/hex2hcd.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

index e6dca5a81..28f0e8be2 100644
@@ -285,6 +285,13 @@ static void ver_parse_file(const char *pathname)
 	prev->next = ver;
 }
 
+static const char *helper_basename(const char *path)
+{
+	const char *base = strrchr(path, '/');
+
+	return base ? base + 1 : path;
+}
+
 static void ver_parse_entry(const char *pathname)
 {
 	struct stat st;

@@ -302,7 +309,7 @@ static void ver_parse_entry(const char *pathname)
 	}
 
 	if (S_ISREG(st.st_mode)) {
-		ver_parse_file(basename(pathname));
+		ver_parse_file(helper_basename(pathname));
 		goto done;
 	}
 

2.45.2

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Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list. This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=870206

---Test result---

Test Summary:

CheckPatch                    PASS      0.48 seconds
GitLint                       PASS      0.33 seconds
BuildEll                      PASS      25.03 seconds
BluezMake                     PASS      1762.86 seconds
MakeCheck                     PASS      13.34 seconds
MakeDistcheck                 PASS      179.83 seconds
CheckValgrind                 PASS      254.74 seconds
CheckSmatch                   WARNING   360.47 seconds
bluezmakeextell               PASS      120.97 seconds
IncrementalBuild              PASS      1489.59 seconds
ScanBuild                     PASS      1014.26 seconds

Details
##############################
Test: CheckSmatch - WARNING
Desc: Run smatch tool with source
Output:
tools/hex2hcd.c:135:26: warning: Variable length array is used.

---
Regards,
Linux Bluetooth