depends: fix typos

depends/README

@@ -7,7 +7,7 @@ There are several features that make it different from most similar systems:
 
 In theory, binaries for any target OS/architecture can be created, from a
 builder running any OS/architecture. In practice, build-side tools must be
-specified when the defaults don't fit, and packages must be ammended to work
+specified when the defaults don't fit, and packages must be amended to work
 on new hosts. For now, a build architecture of x86_64 is assumed, either on
 Linux or OSX.
 

depends/funcs.mk

@@ -205,7 +205,7 @@ endef
 # These functions create the build targets for each package. They must be
 # broken down into small steps so that each part is done for all packages
 # before moving on to the next step. Otherwise, a package's info
-# (build-id for example) would only be avilable to another package if it
+# (build-id for example) would only be available to another package if it
 # happened to be computed already.
 
 #set the type for host/build packages.