[Buildroot] [PATCH v2] toolchain-external: clarify external toolchain description

[Baruch Siach]

External toolchain can also have been generated by Buildroot previously, as
the list that follows demonstrates. Rephrase the paragraph describing what an
external toolchain is as suggested by Thomas Petazzoni, to make it clearer.

Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---

v2:
	Rephrase the entire paragraph as suggested by Tomas P.
---
 toolchain/toolchain-external/toolchain-external.mk | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/toolchain/toolchain-external/toolchain-external.mk b/toolchain/toolchain-external/toolchain-external.mk
index 5a69eb88958e..1a9813e7551a 100644
--- a/toolchain/toolchain-external/toolchain-external.mk
+++ b/toolchain/toolchain-external/toolchain-external.mk
@@ -6,9 +6,10 @@
 
 #
 # This package implements the support for external toolchains, i.e
-# toolchains that have not been produced by Buildroot itself and that
-# Buildroot can download from the Web or that are already available on
-# the system on which Buildroot runs. So far, we have tested this
+# toolchains that are available pre-built, ready to use. Such toolchain
+# may either be readily available on the Web (Linaro, Sourcery
+# CodeBench, from processor vendors) or may be built with tools like
+# Crosstool-NG or Buildroot itself. So far, we have tested this
 # with:
 #
 #  * Toolchains generated by Crosstool-NG
-- 
2.1.4