Rename pl-Krosno_Sucha_Gora with only ASCII characters

The pl-Krosno_Sucha_Gora file, added in commit
4cb113fd15, is the only file that
contains non-ASCII characters in the tree. This causes a number of
build issues with other packages that don't necessarily handle very
well non-ASCII file name encodings.

Since no other file in the tree contain non-ASCII characters in their
name, this commit renames pl-Krosno_Sucha_Gora similarly.

Examples of files that are named with only ASCII characters even if
the city name really contains non-ASCII characters:

  - pl-Wroclaw should be written pl-Wrocław
  - se-Laxsjo should be written se-Laxsjö
  - de-Dusseldorf should be written de-Düsseldorf
  - vn-Thaibinh should be written vn-Thái_Bình

Since there is no real standardization on the encoding of file names,
we'd better be safe and use only ASCII characters.

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

dvb-t/pl-Krosno_Sucha_Gora

@@ -0,0 +1,35 @@
+[CHANNEL]
+	DELIVERY_SYSTEM = DVBT
+	FREQUENCY = 538000000
+	BANDWIDTH_HZ = 8000000
+	CODE_RATE_HP = 5/6
+	CODE_RATE_LP = NONE
+	MODULATION = QAM/64
+	TRANSMISSION_MODE = 8K
+	GUARD_INTERVAL = 1/4
+	HIERARCHY = NONE
+	INVERSION = AUTO
+
+[CHANNEL]
+	DELIVERY_SYSTEM = DVBT
+	FREQUENCY = 562000000
+	BANDWIDTH_HZ = 8000000
+	CODE_RATE_HP = 5/6
+	CODE_RATE_LP = NONE
+	MODULATION = QAM/64
+	TRANSMISSION_MODE = 8K
+	GUARD_INTERVAL = 1/4
+	HIERARCHY = NONE
+	INVERSION = AUTO
+
+[CHANNEL]
+	DELIVERY_SYSTEM = DVBT
+	FREQUENCY = 722000000
+	BANDWIDTH_HZ = 8000000
+	CODE_RATE_HP = 5/6
+	CODE_RATE_LP = NONE
+	MODULATION = QAM/64
+	TRANSMISSION_MODE = 8K
+	GUARD_INTERVAL = 1/4
+	HIERARCHY = NONE
+	INVERSION = AUTO