manifest: Switch to our external/mksh fork

Change-Id: Ie6d54acf23c30ed8a14938929e5999335f16f346
diff --git a/default.xml b/default.xml
index 64a0c6c..d5e126b 100644
--- a/default.xml
+++ b/default.xml
@@ -260,7 +260,7 @@
   <project path="external/Microsoft-GSL" name="platform/external/Microsoft-GSL" groups="pdk" remote="aosp" />
   <project path="external/minigbm" name="platform/external/minigbm" groups="pdk" remote="aosp" />
   <project path="external/minijail" name="platform/external/minijail" groups="pdk" remote="aosp" />
-  <project path="external/mksh" name="platform/external/mksh" groups="pdk" remote="aosp" />
+  <project path="external/mksh" name="LineageOS/android_external_mksh" groups="pdk" />
   <project path="external/mockftpserver" name="platform/external/mockftpserver" groups="pdk" remote="aosp" />
   <project path="external/mockito" name="platform/external/mockito" groups="pdk" remote="aosp" />
   <project path="external/mockwebserver" name="platform/external/mockwebserver" groups="pdk" remote="aosp" />