[prebuilt] Roll banjo to Apr18

Abigen backend uses /// instead of shortdesc for top description.

ZX-3882 #comment [prebuilt] Roll banjo to Apr18

Test: CQ
Change-Id: I5bcde81a7974add21c3c995c56a04e5360c6905f
diff --git a/zircon/prebuilt/zircon.ensure b/zircon/prebuilt/zircon.ensure
index 49780da..0844d45 100644
--- a/zircon/prebuilt/zircon.ensure
+++ b/zircon/prebuilt/zircon.ensure
@@ -59,4 +59,4 @@
 # Banjo compiler
 @Subdir banjo
 # TODO(BLD-341): replace ${os}-${arch=amd64} with ${platform}
-fuchsia/tools/banjo_bin/${os}-${arch=amd64} git_revision:cbc48670732312d95ff4c40993193db822c96d6b
+fuchsia/tools/banjo_bin/${os}-${arch=amd64} git_revision:74d433b8ae7709785b80159b39cfcef831edf19f
diff --git a/zircon/prebuilt/zircon.versions b/zircon/prebuilt/zircon.versions
index b8d5aeb..3735e5b 100644
--- a/zircon/prebuilt/zircon.versions
+++ b/zircon/prebuilt/zircon.versions
@@ -42,12 +42,12 @@
 	T9bWxf8aUC5TwCFgPxpuW29Mfy-7Z9xCfXB9QO8MfU0C
 
 fuchsia/tools/banjo_bin/linux-amd64
-	git_revision:cbc48670732312d95ff4c40993193db822c96d6b
-	PKfASwSkwcfd8Dn1hPdT71rB-544pDvOBumRWCqI3Y4C
+	git_revision:74d433b8ae7709785b80159b39cfcef831edf19f
+	d0RAluy2eanrM0ZLoo-MyWdbCZQuQN6lXow4IyCghAYC
 
 fuchsia/tools/banjo_bin/mac-amd64
-	git_revision:cbc48670732312d95ff4c40993193db822c96d6b
-	HvjRWSu4SFS5iStDwBFF0SrM0q9vebE8pQIaF-uVuKIC
+	git_revision:74d433b8ae7709785b80159b39cfcef831edf19f
+	JIsSrtAPgADk_N14ew9DxTXOzfFsSrmR9OVm5nkwWLsC
 
 fuchsia/tools/symbolize/linux-amd64
 	git_revision:b22d440c081f0c8a75936621df9ca7e6bc018a43