Bullet: allow unbundling only if > 2.87

Looks like we are using cutting edge methods which are not even
if the current stable 2.87.

platform/server/detect.py

@@ -87,12 +87,12 @@ def configure(env):
         env.ParseConfig('pkg-config libpng --cflags --libs')
 
     if not env['builtin_bullet']:
-        # We need at least version 2.87
+        # We need at least version 2.88
         import subprocess
         bullet_version = subprocess.check_output(['pkg-config', 'bullet', '--modversion']).strip()
-        if bullet_version < "2.87":
+        if bullet_version < "2.88":
             # Abort as system bullet was requested but too old
-            print("Bullet: System version {0} does not match minimal requirements ({1}). Aborting.".format(bullet_version, "2.87"))
+            print("Bullet: System version {0} does not match minimal requirements ({1}). Aborting.".format(bullet_version, "2.88"))
             sys.exit(255)
         env.ParseConfig('pkg-config bullet --cflags --libs')
 

platform/x11/detect.py

@@ -173,12 +173,12 @@ def configure(env):
         env.ParseConfig('pkg-config libpng --cflags --libs')
 
     if not env['builtin_bullet']:
-        # We need at least version 2.87
+        # We need at least version 2.88
         import subprocess
         bullet_version = subprocess.check_output(['pkg-config', 'bullet', '--modversion']).strip()
-        if bullet_version < "2.87":
+        if bullet_version < "2.88":
             # Abort as system bullet was requested but too old
-            print("Bullet: System version {0} does not match minimal requirements ({1}). Aborting.".format(bullet_version, "2.87"))
+            print("Bullet: System version {0} does not match minimal requirements ({1}). Aborting.".format(bullet_version, "2.88"))
             sys.exit(255)
         env.ParseConfig('pkg-config bullet --cflags --libs')