tests: improve robustness

Replace some blind timeouts with actual synchronization.
Improve performance on some slow tests.
Tweak some of the remaining timeouts.

This still isn't good enough to get 'make -j9 check'
working reliably on Cygwin for me; I think some Cygwin/
Windows scheduling issues remain.

src/tests/emulation-ascii-iso-8859.test

@@ -21,16 +21,20 @@ baseline()
 {
     printf '\033[H\033[J'
 
-    # ASCII, then ISO-8859-1.
-    for char in $(seq 32 126) $(seq 160 255) ; do
-	if [ $(( char % 16 )) -eq 0 ]; then
-	    printf '\n'
-	fi
-	printf '%02x ' $char
-	utf8cp $char
-	printf ' '
-    done
-    printf '\n'
+    cat <<'EOF'
+20   21 ! 22 " 23 # 24 $ 25 % 26 & 27 ' 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f / 
+30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ? 
+40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O 
+50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _ 
+60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o 
+70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 
+a0   a1 ¡ a2 ¢ a3 £ a4 ¤ a5 ¥ a6 ¦ a7 § a8 ¨ a9 © aa ª ab « ac ¬ ad ­ ae ® af ¯ 
+b0 ° b1 ± b2 ² b3 ³ b4 ´ b5 µ b6 ¶ b7 · b8 ¸ b9 ¹ ba º bb » bc ¼ bd ½ be ¾ bf ¿ 
+c0 À c1 Á c2 Â c3 Ã c4 Ä c5 Å c6 Æ c7 Ç c8 È c9 É ca Ê cb Ë cc Ì cd Í ce Î cf Ï 
+d0 Ð d1 Ñ d2 Ò d3 Ó d4 Ô d5 Õ d6 Ö d7 × d8 Ø d9 Ù da Ú db Û dc Ü dd Ý de Þ df ß 
+e0 à e1 á e2 â e3 ã e4 ä e5 å e6 æ e7 ç e8 è e9 é ea ê eb ë ec ì ed í ee î ef ï 
+f0 ð f1 ñ f2 ò f3 ó f4 ô f5 õ f6 ö f7 ÷ f8 ø f9 ù fa ú fb û fc ü fd ý fe þ ff ÿ 
+EOF
 } 
 
 case $1 in