[readme] part 3 - fix comments.

docs/README.android

@@ -210,13 +210,13 @@ NOTE: if you only want to build specific addons you can specify like this:
 This build was designed to be massively parallel. Don't be afraid to
 give it a 'make -j20' or so.
 
-Verify that all deps built correctly (it will tell you so) before
-continuing. You will get crazy build errors otherwise. If in doubt
-run another 'make' (single threaded) until the message
-"Dependencies built successfully." appears. If the single make
-fails keep cleaning the dependes library in charge by issuing
-    $ make -C target/<name_of_failed_lib> distclean. Then try make again.
+Verify that all dependencies are built correctly (it will tell you so)
+before continuing to avoid errors. If in doubt run another 'make' (single threaded)
+until the message "Dependencies built successfully." appears. If the single make
+fails, keep cleaning the specific library by issuing:
+    $ make -C target/<name_of_failed_lib> distclean
 
+Then try make again.
 Rinse and repeat until you are really done and all libs are built.
 
 --------------------------------------------------------------------

docs/README.linux

@@ -102,14 +102,14 @@ Tip: By adding -j<number> to the make command, you describe how many
 
     $ make -j2
 
-.3  $ make install
+.3  $ sudo make install
 
 This will install Kodi in the prefix provided in 4.1 as well as a launcher script.
 
 Tip: To override the location that Kodi is installed, use PREFIX=<path>.
 For example.
 
-    $ sudo make install DESTDIR=$HOME/kodi
+    $ make install DESTDIR=$HOME/kodi
 
 -----------------------------------------------------------------------------
 4.4. Binary addons - compile