Update the docs for 'mm[m][a]'

Make it explicit that we will build *and* install all the modules under
the directories. And that 'mm[m]' is now the same as 'mm[m][a]'.

Test: hmm
Change-Id: I86c42229f8cdc24922fb3014777ad13d72a1c0ea
diff --git a/envsetup.sh b/envsetup.sh
index f0c6b9b..37993f8 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -11,11 +11,13 @@
 - tapas:      tapas [<App1> <App2> ...] [arm|x86|mips|arm64|x86_64|mips64] [eng|userdebug|user]
 - croot:      Changes directory to the top of the tree, or a subdirectory thereof.
 - m:          Makes from the top of the tree.
-- mm:         Builds all of the modules in the current directory, but not their dependencies.
-- mmm:        Builds all of the modules in the supplied directories, but not their dependencies.
+- mm:         Builds and installs all of the modules in the current directory, and their
+              dependencies.
+- mmm:        Builds and installs all of the modules in the supplied directories, and their
+              dependencies.
               To limit the modules being built use the syntax: mmm dir/:target1,target2.
-- mma:        Builds all of the modules in the current directory, and their dependencies.
-- mmma:       Builds all of the modules in the supplied directories, and their dependencies.
+- mma:        Same as 'mm'
+- mmma:       Same as 'mmm'
 - provision:  Flash device with all required partitions. Options will be passed on to fastboot.
 - cgrep:      Greps on all local C/C++ files.
 - ggrep:      Greps on all local Gradle files.