support/scripts/gen-bootlin-toolchains: make use of BR2_TOOLCHAIN_EXTERNAL_HAS_NO_GDBSERVER

The microblazeel, microblazebe and openrisc toolchains need to select
this option as they don't have any gdb/gdbserver.

Helps in fixing:

  http://autobuild.buildroot.net/results/6315ef7b66ee4ae8f870c92186bc674d65f62f2c/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

support/scripts/gen-bootlin-toolchains

@@ -73,10 +73,12 @@ arches = {
     'microblazebe': {
         'conditions': ['BR2_microblazebe'],
         'prefix': 'microblaze',
+        'gdbserver': False
     },
     'microblazeel': {
         'conditions': ['BR2_microblazeel'],
         'prefix': 'microblazeel',
+        'gdbserver': False
     },
     'mips32': {
         # Not sure it could be used by other mips32 variants?
@@ -122,6 +124,7 @@ arches = {
     'openrisc': {
         'conditions': ['BR2_or1k'],
         'prefix': 'or1k',
+        'gdbserver': False,
     },
     'powerpc-440fp': {
         # Not sure it could be used by other powerpc variants?
@@ -311,6 +314,9 @@ class Toolchain:
         for c in arches[self.arch]['conditions']:
             depends.append(c)
 
+        if not arches[self.arch].get('gdbserver', True):
+            selects.append("BR2_TOOLCHAIN_EXTERNAL_HAS_NO_GDBSERVER")
+
         for frag in self.fragment:
             # libc type
             if frag.startswith("BR2_TOOLCHAIN_EXTERNAL_CUSTOM_UCLIBC"):