gl2shim: remove float suffix in shaders, that makes glsl100 work in swiftshader

ref/gl/gl2_shim/fragment.glsl.inc

@@ -63,7 +63,7 @@
 "#endif\n"
 "#if FEAT_FOG\n"
 "float fogDist = gl_FragCoord.z / gl_FragCoord.w;\n"
-"float fogRate = clamp(exp(-uFog.w * fogDist), 0.f, 1.f);\n"
+"float fogRate = clamp(exp(-uFog.w * fogDist), 0.0, 1.0);\n"
 "c.rgb = mix(uFog.rgb, c.rgb, fogRate);\n"
 "#endif\n"
 "oFragColor = c;\n"

ref/gl/gl2_shim/vertex.glsl.inc

@@ -37,7 +37,7 @@
 "\n"
 "void main()\n"
 "{\n"
-"gl_Position = uMVP * vec4(inPosition,1.0f);\n"
+"gl_Position = uMVP * vec4(inPosition,1.0);\n"
 "#if ATTR_COLOR\n"
 "vColor = inColor;\n"
 "#endif\n"