package/glibc: fix typo in hash file

Fixes:

package/glibc/arc-2018.03-release/glibc.hash:4: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
package/glibc/arc-2018.03-release/glibc.hash:4: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/glibc/arc-2018.03-release/glibc.hash

@@ -1,7 +1,7 @@
 # Locally calculated (fetched from Github)
 sha256  e08ab67b2db2d0f0e8f3311d23c54fb8f6d4c1ef6fa0b4047fd5da400e3ce9de  glibc-arc-2018.03-release.tar.gz
 
-$ Hashes for license files
+# Hashes for license files
 sha256  8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING
 sha256  dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING.LIB
 sha256  61abdd6930c9c599062d89e916b3e7968783879b6be0ee1c6229dd6169def431  LICENSES