Remove a bunch of slow, failing builds

metadata/com.launcher.silverfish.txt

@@ -38,6 +38,7 @@ Build:0.3,3
     prebuild=echo -e "android { lintOptions { disable 'MissingTranslation' } }" >> build.gradle
 
 Build:0.4,4
+    disable=java compile error
     commit=v0.4
     subdir=app
     gradle=yes

metadata/org.mozilla.fennec_fdroid.txt

@@ -2718,6 +2718,7 @@ Build:48.0,480010
         mv obj-${fxarch}/dist/fennec-*-unsigned-unaligned.apk fdroid/fennec-unsigned.apk
 
 Build:49.0,490000
+    disable=failing build
     commit=FENNEC_49_0_RELEASE
     output=fdroid/fennec-unsigned.apk
     srclibs=MozLocales@4e9bb09ee8c7b5d8d549eff522617613daaf6165
@@ -2751,6 +2752,7 @@ Build:49.0,490000
     ndk=r10e
 
 Build:49.0,490010
+    disable=failing build
     commit=FENNEC_49_0_RELEASE
     output=fdroid/fennec-unsigned.apk
     srclibs=MozLocales@4e9bb09ee8c7b5d8d549eff522617613daaf6165

metadata/org.videolan.vlc.txt

@@ -1058,6 +1058,7 @@ Build:1.9.0,1090005
         ./compile.sh -a "x86" --release
 
 Build:2.0.2,12000213
+    disable=failing build
     commit=2.0.2.1
     subdir=vlc-android
     gradle=VanillaARMv6fpu
@@ -1070,6 +1071,7 @@ Build:2.0.2,12000213
     ndk=r11c
 
 Build:2.0.2,12000214
+    disable=failing build
     commit=2.0.2.1
     subdir=vlc-android
     gradle=VanillaARMv7
@@ -1082,6 +1084,7 @@ Build:2.0.2,12000214
     ndk=r11c
 
 Build:2.0.2,12000215
+    disable=failing build
     commit=2.0.2.1
     subdir=vlc-android
     gradle=VanillaX86
@@ -1094,6 +1097,7 @@ Build:2.0.2,12000215
     ndk=r11c
 
 Build:2.0.5,12000523
+    disable=failing build
     commit=2.0.5
     subdir=vlc-android
     gradle=VanillaARMv6fpu
@@ -1106,6 +1110,7 @@ Build:2.0.5,12000523
     ndk=r11c
 
 Build:2.0.5,12000524
+    disable=failing build
     commit=2.0.5
     subdir=vlc-android
     gradle=VanillaARMv7
@@ -1118,6 +1123,7 @@ Build:2.0.5,12000524
     ndk=r11c
 
 Build:2.0.5,12000525
+    disable=failing build
     commit=2.0.5
     subdir=vlc-android
     gradle=VanillaX86